v0.4.3

中文

• 为 checkpoint-only 的 tasks.md 更新增加固定 checkpoint 跟踪提交。
• 新增 checkpoint 修复规则：如果 checkpoint 已标记完成但更新未提交，后续会话应先创建 checkpoint tracking commit。
• README 和校验脚本已同步 checkpoint commit 规则。

English

• Add a fixed checkpoint tracking commit for checkpoint-only tasks.md updates.
• Add a checkpoint repair rule: if a checkpoint is marked complete but uncommitted, later sessions should create the checkpoint tracking commit first.
• Sync README and validation checks with the checkpoint commit policy.

Full Changelog: v0.4.2...v0.4.3